body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    color: #333;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
}

nav li {
    margin: 0 20px;
}

nav a {
    text-decoration: none;
    color: #333;
    font-weight: bold;
    padding: 15px 0;
    display: block;
    transition: color 0.3s ease;
}

nav a:hover {
    color: #ff6b6b;
}

main {
    max-width: 800px;
    margin: 40px auto;
    padding: 20px;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    flex: 1;
}

h1 {
    color: #ff6b6b;
    text-align: center;
    margin-bottom: 20px;
}

h2 {
    color: #4ecdc4;
    margin-top: 30px;
}

ul {
    padding-left: 20px;
}

li {
    margin-bottom: 10px;
}

a {
    color: #3498db;
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: #2980b9;
}

footer {
    text-align: center;
    padding: 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    margin-top: auto;
    box-shadow: 0 -2px 4px rgba(0,0,0,0.1);
}

.footer-content p {
    margin: 5px 0;
}

.footer-content a {
    color: #ffd700;
    text-decoration: none;
    font-weight: bold;
}

.footer-content a:hover {
    text-decoration: underline;
}

.footer-content p {
    margin: 5px 0;
}

.footer-content a {
    color: #ffd700;
    text-decoration: none;
    font-weight: bold;
}

.footer-content a:hover {
    text-decoration: underline;
}

@media (max-width: 768px) {
    nav ul {
        flex-direction: column;
        align-items: center;
    }

    nav li {
        margin: 10px 0;
    }

    main {
        margin: 20px 10px;
        padding: 15px;
    }

    h1 {
        font-size: 1.8em;
    }
}